Mine Waste Like Those Found in Sudbury Could Strengthen National Security (Sudbury Star – March 9, 2026)

Key Takeaways

• Canada has over 10,000 mineral tailings sites
• Tailings hold recoverable nickel, cobalt, copper, rare earths
• Estimated reserves total several million tons of critical minerals
• Recycling waste could slash foreign mineral imports
• Defence policy may integrate tailings reprocessing for sovereignty

Summary

Nadia Mykytczuk, director of Laurentian University’s Goodman School of Mines, told Canada’s Standing Committee on National Defence that the country’s abundant mining tailings contain billions of dollars’ worth of critical minerals such as nickel, copper, cobalt and rare earth elements. Canada hosts more than 10,000 tailings sites, each holding recoverable concentrations that together represent several million tons of strategic metals. She argued that re‑processing this historic waste offers a rapid path to boost defence‑related supply security and reduce reliance on foreign sources. The proposal positions mining waste as a national security asset rather than an environmental liability.

Pulse Analysis

Canada’s critical mineral strategy is at a crossroads, with defence ministries worldwide scrambling for secure sources of nickel, cobalt, copper and rare earth elements. While traditional mining projects face permitting delays and geopolitical risk, the nation’s legacy tailings—over 10,000 sites scattered from Sudbury to the Arctic—represent a hidden cache of these same materials. By treating tailings as "basic reserves," policymakers can tap a domestic supply that aligns with the rapid electrification of military hardware, from advanced batteries to stealth coatings.

Extracting metals from tailings is not merely a theoretical exercise; pilot plants in Ontario and British Columbia have already demonstrated viable leaching and solvent‑extraction techniques that recover up to 90% of target elements. These processes not only generate high‑grade concentrates but also mitigate long‑standing environmental concerns by stabilising waste piles and reducing groundwater contamination. Economically, re‑processing leverages existing infrastructure, cuts capital expenditures compared with new mines, and creates a new revenue stream for communities historically dependent on mining. The main challenges lie in scaling technologies, securing investment, and navigating regulatory frameworks that were originally designed for waste disposal rather than resource recovery.

Integrating tailings re‑processing into Canada’s defence procurement roadmap could reshape trade dynamics and strategic autonomy. A domestic supply chain diminishes exposure to export controls from rival powers and supports the government’s goal of achieving 30% of defence‑critical minerals from Canadian sources by 2030. Moreover, the environmental co‑benefits reinforce Canada’s green defence narrative, appealing to allies and investors alike. As the federal budget earmarks funds for critical mineral innovation, a coordinated effort between the Department of National Defence, Natural Resources Canada, and industry stakeholders will be essential to turn historic waste into a cornerstone of national security.